Depiction in the series

Sapphire Shores amazed at Rarity's design.

Sapphire Shores appears in the cold opening/introduction of A Dog and Pony Show, walking into Rarity's Carousel Boutique after hearing about her designs. Rarity is awe-struck when she sees Sapphire, and addresses her as "The Pony of Pop." Sapphire is enthralled by Rarity's newly-made diamond garment and wants to buy it for her tour, called Sapphire Shores' Zigfilly Follies.

Along with that particular garment, she requests five more costumes in gems of different sorts, which is a problem for Rarity, as she had used all of her gems to make the one garment.

Sapphire appears again in For Whom the Sweetie Belle Toils as one of Rarity's premiere clients. She initially appears in Sweetie Belle's dream, disapproving of Rarity's slipshod fashion designs and calling her "my ex-costume designer." She later appears alongside her backup dancers during a rehearsal in Canterlot. When Rarity shows Sapphire the costumes she made for her, she expresses her utmost approval for Sweetie Belle's dolphin-shaped stitching, the shape of Sapphire's "lucky animal."

Two of Sapphire Shores' songs, as mentioned by Apple Bloom and Scootaloo, are called "Get Your Pony On" and "Serves Her Right."

Sapphire Shores is a playable character in Gameloft's mobile game, where her in-game description states "Known as "the Pony of Pop", Sapphire Shores is a celebrity mare from Canterlot who enjoys Rarity's clothing designs." She is the focus of the quests for the Mine Cart minigame, where the player must collect gems to make a new dress for her next tour.

Merchandise

Sapphire Shores from mystery packs.

The fifth wave of mystery pack toys and collector cards includes Sapphire Shores as a unicorn with a light green coat, a blue and white mane, blue eyes, and a seashell cutie mark. Like many other mystery pack characters, she here uses the same design as another pony, in this case unicorn Twilight Sparkle. The European earlier version of the card states that she "is quietly kind[,]" while the U.S. later version of the card lists her name with a trademark symbol and states that she "loves to collect pretty seashells."
An Equestria Girls: Rainbow Rocks doll of Sapphire Shores has been listed on Hasbro's website.[5] The packaging lists her name with a trademark symbol, shows her both as a pony—this time using her usual appearance—and as a human, and states, "It's all about standout style when you're a pop star like me! I always dress to impress and look fabulous on stage."

In Enterplay's trading cardss series 2 card #23 of Sapphire Shores lists her name with a trademark symbol, erroneously lists her cutie mark as not known, and gives her the description, "Look, look, it's the world famous Pony of Pop herself, Sapphire Shores! Sapphire knows that even the most talented pony has to look sensational when she goes out on stage, so she makes it a point to know all the up-and-coming designers—like Rarity! You can see Sapphire Shores in concert on her spectacular tour, Sapphire Shores Zigfilly Follies! Just don't be surprised if her fans faint. She does have that effect on a pony."

Series 3 cards #5, #F14, and #F59 of Rarity mention "the second biggest pony pop star in Equestria, Sapphire Shores!", card #E19 of A Dog and Pony Show mentions Sapphire Shores and lists it as her first appearance, and card #E84 of For Whom the Sweetie Belle Toils mentions Sapphire Shores and lists it as her second appearance.

In the Canterlot Nights expansion set of Enterplay's collectible card game card #80 C of Sapphire Shores lists her name with a trademark symbol and gives her the description, "There wasn't a single show on Bridleway that could compete with Sapphire Shores' Ziegfilly Follies until Hinny of the Hills. Sapphire isn't very fond of that particular musical." In the Absolute Discord expansion set, card #62 C of Sapphire Shores identifies her as a unicorn and lists the quote, "If I'm going to reclaim my place as the number one Pony of Pop, my next show has to be TWICE as big and TWICE as bold!" In the Equestrian Odysseys expansion set, card #74 R of Sapphire Shores gives her the description, "When Sapphire Shores is up there on stage, with a brand new costume and dazzling backup performers, she knows she has everypony's attention!"

The Elements of Harmony guidebook

SAPPHIRE SHORES is known for her music throughout Equestria as the Pony of Pop. The fashion-forward celebrity has a taste for Rarity's jeweled creations.

Volume II guidebook

SAPPHIRE SHORES is a big star, known across the Equestria as "the Pony of Pop." She had Rarity design quite a few outfits for her over many moons, including a whole gem-based wardrobe for her Sapphire Shores's Zigfilly Follies tour.

Personality

"Yes, I do have that effect on ponies."

— Sapphire Shores, referring to Rarity fainting

Sapphire speaks with a loud, theatrical voice and with an accent reminiscent of an African-American vernacular, and she frequently inserts musical intonations into her sentences. She appears to be a parody of the self-promoting star who is always "on." Despite her fame and over-the-top mannerisms, she seems to be quite friendly and approachable towards Rarity.

Quotes

"I make it a point to know all of the up-and-coming designers, and Clothes Horse magazine simply raved about you."

"This mine is amaaaazing! I could make 1,000 dresses out of the stuff down here! But I, uh, maybe got a little carried away and rode the mine cart so fast the wheels melted, so... Can you please help me find some new ones?"

— My Little Pony (mobile game)

"With these new mine cart wheels ready to go, we can explore the mine whenever we want! Ah, just... please don't tell Twilight I melted the last ones..."

— My Little Pony (mobile game)

"Phew... Mine carting is hard work for a sensational pony-pop icon like me! But as the mare's tale says, to be the best you've got to practice, practice, practice!"

— My Little Pony (mobile game)

"That's 1,000 steps for a pony... and one giant leap for ponykind!"

— My Little Pony (mobile game)

"I've been asking very politely, but you haven't found me ANYTHING for my new dress! i've got to be on the stage in a few hours!!! What am I going to wear?! One of my 437 other dresses?! everyone's already seen them!"

— My Little Pony (mobile game)

"These... these are beautiful... Laughter, generosity, kindness... Oh, I'm so sorry! I haven't shown ANY of those things! Thank you for helping me find something so much more important than a dress: true friends."

— My Little Pony (mobile game)

"If I'm going to reclaim my place as the number one Pony of Pop, my next show has to be TWICE as big and TWICE as bold!"